A Dual beam H<img src='/image/spc_char/alpha.gif' border=0> Doppler system to acquire, analyse and anticipate solar eruptive events directed towards Earth

Abstract

A new instrument with a dual-beam Hα Doppler system is being developed at the Udaipur Solar Observatory (USO) in order to improve the quality and quantity of data on quiet, activated and erupting filaments and prominences on the Sun, especially those associated with geo-effective coronal mass ejections. These data can be potentially used to construct three-dimensional topology of erupting filaments as they leave the surface of the Sun and can be compared with multi-wavelength data obtained from space missions such as STEREO, SOHO and Hinode. The characterization of various optical components for the instrument is being carried out, and some preliminary results are presented in the paper.